Christopher Law, the division's former managing director, was charged with three separate offences relating to a three-year period between 1 January 2004 and 26 February 2007.
He is alleged to have exaggerated sales in accounts filed to the parent company Alfred McAlpine, which was taken over by Carillion late last year.
Alfred McAlpine reported to the stock market on 26 February 2007 that its internal audit team had uncovered a systematic misrepresentation of production volumes and sales for a number of years by senior managers at Welsh Slate which would lead to a restatement of the 2005 net assets and a reduction in the expected pre-tax profits for 2006.ADVERTISEMENT
Lagan bought Alfred McAlpine Slate at the same time for ВЈ31m.
Geraint Roberts, Alfred McAlpine SlateвЂ™s former operations director, and Paul Harvey, its former sales director, were charged with fraudulent trading in relation to the scandal.
The charges follow a joint investigation by the Serious Fraud Office (SFO) and North Wales Police.
There will be a preliminary hearing at Mold Crown Court. The defendants are on conditional bail.
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